Hello,
In the twisted documentation there is this example:
from twisted.internet import threads
def doLongCalculation():
# .... do long calculation here ...
return 3
def printResult(x):
print x
# run method in thread and get result as defer.Deferred
d = threads.deferToThread(doLongCalculation)
d.addCallback(printResult)
This works well as long as doLongCalculation() doesn't fail for
any reason. But if it does, how can it trigger an errBack?
I want to do something like this:
from twisted.internet import threads
def doLongCalculation():
try:
# .... do long calculation here ...
except:
< what can I return here to tell that
the calculation failed? >
return 3
def printResult(x):
print x
def badResult(failure):
print "Calculation failed!"
# run method in thread and get result as defer.Deferred
d = threads.deferToThread(doLongCalculation)
d.addCallbacks(printResult, badResult)
Thanks in advance for your help,
--
Pedro